Year Years 1800 439.8 1801 439.8 1802 439.8 1803 439.8 1804 439.8 1805 439.8 1806 439.8 1807 439.8 1808 439.8 1809 439.8 1810 439.8 1811 439.8 1812 439.8 1813 439.8 1814 439.8 1815 439.8 1816 439.8 1817 439.8 1818 439.8 1819 439.8 1820 439.8 1821 439.8 1822 439.8 1823 439.8 1824 439.8 1825 439.8 1826 439.8 1827 439.8 1828 439.8 1829 439.8 1830 439.8 1831 439.8 1832 439.8 1833 439.8 1834 439.8 1835 439.8 1836 439.8 1837 439.8 1838 439.8 1839 439.8 1840 439.8 1841 439.8 1842 439.8 1843 439.8 1844 439.8 1845 439.8 1846 439.8 1847 439.8 1848 439.8 1849 439.8 1850 439.8 1851 439.8 1852 439.8 1853 439.8 1854 439.8 1855 439.8 1856 439.8 1857 439.8 1858 439.8 1859 439.8 1860 439.8 1861 439.8 1862 439.8 1863 439.8 1864 439.8 1865 439.8 1866 439.8 1867 439.8 1868 439.8 1869 439.8 1870 439.8 1871 439.8 1872 439.8 1873 439.8 1874 439.8 1875 439.8 1876 439.8 1877 439.8 1878 439.8 1879 439.8 1880 439.8 1881 439.8 1882 439.8 1883 439.8 1884 439.8 1885 439.8 1886 439.8 1887 439.8 1888 439.8 1889 439.8 1890 439.8 1891 439.8 1892 439.8 1893 439.8 1894 439.8 1895 439.8 1896 439.7 1897 439.6 1898 439.4 1899 439.1 1900 438.8 1901 438.5 1902 438 1903 437.5 1904 436.9 1905 436.3 1906 435.5 1907 434.8 1908 433.9 1909 433 1910 432 1911 431 1912 430 1913 429 1914 427.9 1915 426.9 1916 425.9 1917 424.8 1918 423.8 1919 422.8 1920 421.7 1921 420.7 1922 419.7 1923 418.6 1924 417.6 1925 416.6 1926 415.5 1927 414.5 1928 413.5 1929 412.4 1930 411.4 1931 410.4 1932 409.4 1933 408.3 1934 407.3 1935 406.2 1936 405.2 1937 404.2 1938 403.1 1939 402.1 1940 401.1 1941 400.1 1942 399 1943 398 1944 397 1945 395.9 1946 394.9 1947 393.9 1948 392.8 1949 391.8 1950 390.8 1951 387.4 1952 380.5 1953 373.2 1954 365.6 1962 279.9 1963 278.7 1964 277.6 1965 276.3 1966 275.1 1967 274 1968 273 1969 272.1 1970 270.9 1971 269.6 1972 268.3 1973 266.9 1974 265.6 1975 264.4 1976 263.2 1977 262 1978 260.9 1979 260.1 1980 259.2 1981 258.7 1982 257.5 1983 255.8 1984 254 1985 251.6 1986 248.8 1987 245.8 1988 242.9 1989 240.1 1990 237 1991 233.6 1992 229.6 1993 224.7 1994 219 1995 212.1 1996 204.2 1997 195.5 1998 186.4 1999 177.2 2000 168.5 2001 160.2 2002 152.9 2003 146 2004 139.5 2005 133.4 2006 127.5 2007 119.9 2008 113.3 2009 107.3 2010 102.5 2011 97.2 2012 90.6 2013 87.2